520577221 has 12 divisors (see below), whose sum is σ = 537378688. Its totient is φ = 504018144.

The previous prime is 520577207. The next prime is 520577261. The reversal of 520577221 is 122775025.

It is not a de Polignac number, because 520577221 - 2⁷ = 520577093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520577261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2234121 + ... + 2234353.

Almost surely, 2^520577221 is an apocalyptic number.

It is an amenable number.

520577221 is a deficient number, since it is larger than the sum of its proper divisors (16801467).

520577221 is an equidigital number, since it uses as much as digits as its factorization.

520577221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 520577221 is about 22816.1613993239. The cubic root of 520577221 is about 804.4425862213.

The spelling of 520577221 in words is "five hundred twenty million, five hundred seventy-seven thousand, two hundred twenty-one".